/*global escape:true */

var TableStore = require('./core');
//var cryptoLib = require('crypto');
var jsSHA = require('../bower_components/jsSHA/src/sha.js');
var SparkMD5 = require('../bower_components/spark-md5/spark-md5.js');
var int64buffer = require("int64-buffer");

/* jshint -W079 */
var Buffer = require('buffer/').Buffer;
/* jshint +W079 */

/**
 * A set of utility methods for use with the TableStore SDK.
 *
 * @!attribute abort
 *   Return this value from an iterator function {each} or {arrayEach}
 *   to break out of the iteration.
 *   @example Breaking out of an iterator function
 *     TableStore.util.each({a: 1, b: 2, c: 3}, function(key, value) {
 *       if (key == 'b') return TableStore.util.abort;
 *     });
 *   @see each
 *   @see arrayEach
 * @api private
 */
TableStore.util = {
    engine: function engine() {
        if (TableStore.util.isBrowser() && typeof navigator !== 'undefined') {
            return navigator.userAgent;
        } else {
            return process.platform + '/' + process.version;
        }
    },

    userAgent: function userAgent() {
        // 在 浏览器中不能设置 ua
        return "";
    },

    isBrowser: function isBrowser() { return typeof window !== 'undefined'; },
    isNode: function isNode() { return !TableStore.util.isBrowser(); },
    nodeRequire: function nodeRequire(module) {
        if (TableStore.util.isNode()) return require(module);
    },

    // todo: atob, btoa
    hexToBase64: function (str) {
        return btoa(String.fromCharCode.apply(null,
            str.replace(/\r|\n/g, "").replace(/([\da-fA-F]{2}) ?/g, "0x$1 ").replace(/ +$/, "").split(" "))
        );
    },

    topEscape: function (clearString) {
        var output = '';
        var x = 0;
        clearString = clearString.toString();
        var regex = /(^[a-zA-Z0-9-_.~]*)/;
        while (x < clearString.length) {
            var match = regex.exec(clearString.substr(x));
            if (match != null && match.length > 1 && match[1] != '') {
                output += match[1];
                x += match[1].length;
            } else {
                if (clearString[x] == ' ')
                    output += '%20';
                else {
                    var charCode = clearString.charCodeAt(x);
                    var hexVal = charCode.toString(16);
                    output += '%' + (hexVal.length < 2 ? '0' : '') + hexVal.toUpperCase();
                }
                x++;
            }
        }
        return output;
    },

    popEscape: function (clearString) {
        clearString = clearString.toString();
        clearString = encodeURIComponent(clearString)
            .replace(/\!/gi, '%21')
            .replace(/\'/gi, '%27')
            .replace(/\(/gi, '%28')
            .replace(/\)/gi, '%29')
            .replace(/\*/gi, '%2A')
        return clearString;
    },

    opensearchEscape: function (clearString) {
        // http://v8.googlecode.com/svn/trunk/src/uri.js
        return encodeURIComponent(clearString)
            .replace(/\!/gi, '%21')
            .replace(/\'/gi, '%27')
            .replace(/\(/gi, '%28')
            .replace(/\)/gi, '%29')
            .replace(/\*/gi, '%2A')
    },

    uriEscape: function uriEscape(string) {
        /*jshint undef:false */
        var output = encodeURIComponent(string);
        output = output.replace(/[^A-Za-z0-9_.~\-%]+/g, escape);

        // percent-encodes some extra non-standard characters in a URI
        output = output.replace(/[*]/g, function (ch) {
            return '%' + ch.charCodeAt(0).toString(16).toUpperCase();
        });

        return output;
    },

    uriEscapePath: function uriEscapePath(string) {
        var parts = [];
        TableStore.util.arrayEach(string.split('/'), function (part) {
            parts.push(TableStore.util.uriEscape(part));
        });
        return parts.join('/');
    },

    urlParse: function urlParse(url) {
        return require('url').parse(url);
    },

    urlFormat: function urlFormat(url) {
        return require('url').format(url);
    },

    uuid: function generateUUID() {
        var d = new Date().getTime();
        if (window.performance && typeof window.performance.now === "function") {
            d += performance.now(); //use high-precision timer if available
        }
        var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
            var r = (d + Math.random() * 16) % 16 | 0;
            d = Math.floor(d / 16);
            return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
        });
        return uuid;
    },

    queryParamsToString: function queryParamsToString(params) {
        var items = [];
        var escape = TableStore.util.uriEscape;
        var sortedKeys = Object.keys(params).sort();

        TableStore.util.arrayEach(sortedKeys, function (name) {
            var value = params[name];
            var ename = escape(name);
            var result = ename;
            if (Array.isArray(value)) {
                var vals = [];
                TableStore.util.arrayEach(value, function (item) { vals.push(escape(item)); });
                result = ename + '=' + vals.sort().join('&' + ename + '=');
            } else if (value !== undefined && value !== null) {
                result = ename + '=' + escape(value);
            }
            items.push(result);
        });

        return items.join('&');
    },

    readFileSync: function readFileSync(path) {
        if (typeof window !== 'undefined') return null;
        return require('fs').readFileSync(path, 'utf-8');
    },

    base64: {

        encode: function encode64(string) {
            if (typeof string === 'number') {
                throw util.error(new Error('Cannot base64 encode number ' + string));
            }
            if (string === null || typeof string === 'undefined') {
                return string;
            }
            var buf = (typeof TableStore.util.Buffer.from === 'function' && TableStore.util.Buffer.from !== Uint8Array.from) ? TableStore.util.Buffer.from(string) : new TableStore.util.Buffer(string);
            return buf.toString('base64');
        },

        decode: function decode64(string) {
            if (typeof string === 'number') {
                throw util.error(new Error('Cannot base64 decode number ' + string));
            }
            if (string === null || typeof string === 'undefined') {
                return string;
            }
            return (typeof TableStore.util.Buffer.from === 'function' && TableStore.util.Buffer.from !== Uint8Array.from) ? TableStore.util.Buffer.from(string, 'base64') : new TableStore.util.Buffer(string, 'base64');
        }

    },

    Buffer: Buffer,

    buffer: {
        /**
         * Concatenates a list of Buffer objects.
         */
        concat: function (buffers) {
            var length = 0,
                offset = 0,
                buffer = null, i;

            for (i = 0; i < buffers.length; i++) {
                length += buffers[i].length;
            }

            buffer = new TableStore.util.Buffer(length);

            for (i = 0; i < buffers.length; i++) {
                buffers[i].copy(buffer, offset);
                offset += buffers[i].length;
            }

            return buffer;
        }
    },

    Int64: {
        doubleToRawLongBits: function (number) {
            var buf = new Buffer(8);
            buf.fill(0);
            buf.writeDoubleLE(number, 0);

            var int64 = new int64buffer.Int64LE(buf);
            return int64;
        }
    },

    string: {
        byteLength: function byteLength(string) {
            if (string === null || string === undefined) return 0;
            if (typeof string === 'string') string = new Buffer(string);

            if (typeof string.byteLength === 'number') {
                return string.byteLength;
            } else if (typeof string.length === 'number') {
                return string.length;
            } else if (typeof string.size === 'number') {
                return string.size;
            } else if (typeof string.path === 'string') {
                return require('fs').lstatSync(string.path).size;
            } else {
                throw TableStore.util.error(new Error('Cannot determine length of ' + string),
                    { object: string });
            }
        },
        upperFirst: function upperFirst(string) {
            return string[0].toUpperCase() + string.substr(1);
        },

        lowerFirst: function lowerFirst(string) {
            return string[0].toLowerCase() + string.substr(1);
        }

    },

    jamespath: {
        query: function query(expression, data) {
            if (!data) return [];

            var results = [];
            var expressions = expression.split(/\s+or\s+/);
            TableStore.util.arrayEach.call(this, expressions, function (expr) {
                var objects = [data];
                var tokens = expr.split('.');
                TableStore.util.arrayEach.call(this, tokens, function (token) {
                    var match = token.match('^(.+?)(?:\\[(-?\\d+|\\*)\\])?$');
                    var newObjects = [];
                    TableStore.util.arrayEach.call(this, objects, function (obj) {
                        if (match[1] === '*') {
                            TableStore.util.arrayEach.call(this, obj, function (value) {
                                newObjects.push(value);
                            });
                        } else if (obj.hasOwnProperty(match[1])) {
                            newObjects.push(obj[match[1]]);
                        }
                    });
                    objects = newObjects;

                    // handle indexing (token[0], token[-1])
                    if (match[2]) {
                        newObjects = [];
                        TableStore.util.arrayEach.call(this, objects, function (obj) {
                            if (Array.isArray(obj)) {
                                if (match[2] === '*') {
                                    newObjects = newObjects.concat(obj);
                                } else {
                                    var idx = parseInt(match[2], 10);
                                    if (idx < 0) idx = obj.length + idx; // negative indexing
                                    newObjects.push(obj[idx]);
                                }
                            }
                        });
                        objects = newObjects;
                    }

                    if (objects.length === 0) return TableStore.util.abort;
                });

                if (objects.length > 0) {
                    results = objects;
                    return TableStore.util.abort;
                }
            });

            return results;
        },

        find: function find(expression, data) {
            return TableStore.util.jamespath.query(expression, data)[0];
        }
    },

    /**
     * Date and time utility functions.
     */
    date: {

        /**
         * @return [Date] the current JavaScript date object. Since all
         *   TableStore services rely on this date object, you can override
         *   this function to provide a special time value to TableStore service
         *   requests.
         */
        getDate: function getDate() { return new Date(); },

        // for taobao open platform
        top: function top(date, fmt) {
            fmt = fmt || '%Y-%M-%dT%H:%m:%sZ';

            function pad(value) {
                return (value.toString().length < 2) ? '0' + value : value;
            };

            return fmt.replace(/%([a-zA-Z])/g, function (_, fmtCode) {
                switch (fmtCode) {
                    case 'Y':
                        return date.getUTCFullYear();
                    case 'M':
                        return pad(date.getUTCMonth() + 1);
                    case 'd':
                        return pad(date.getUTCDate());
                    case 'H':
                        return pad(date.getUTCHours());
                    case 'm':
                        return pad(date.getUTCMinutes());
                    case 's':
                        return pad(date.getUTCSeconds());
                    default:
                        throw new Error('Unsupported format code: ' + fmtCode);
                }
            });
        },

        /**
         * @return [String] the date in ISO-8601 format
         */
        iso8601: function iso8601(date) {
            if (date === undefined) { date = TableStore.util.date.getDate(); }
            return date.toISOString();
        },

        /**
         * @return [String] the date in RFC 822 format
         */
        rfc822: function rfc822(date) {
            if (date === undefined) { date = TableStore.util.date.getDate(); }
            return date.toUTCString();
        },

        unixSeconds: function unixSeconds(date) {
            if (date === undefined) { date = TableStore.util.date.getDate(); }
            return Math.floor(date.getTime() / 1000);
        },

        unixMilliseconds: function unixMilliseconds(date) {
            if (date === undefined) { date = TableStore.util.date.getDate(); }
            return date.getTime();
        },

        /**
         * @param [String,number,Date] date
         * @return [Date]
         */
        from: function format(date) {
            if (typeof date === 'number') {
                if (date.toString().length == 10) {
                    return new Date(date * 1000); // unix timestamp in seconds
                }
                return new Date(date); // unix timestamp in mill seconds
            }
            else if (Object.prototype.toString.call(date) === '[object Date]') {
                return date;
            }
            else {
                return new Date(date);
            }
        },

        /**
         * Given a Date or date-like value, this function formats the
         * date into a string of the requested value.
         * @param [String,number,Date] date
         * @param [String] formatter Valid formats are:
         #   * 'iso8601'
         #   * 'rfc822'
         #   * 'unixSeconds'
         #   * 'unixMilliseconds'
         * @return [String]
         */
        format: function format(date, formatter) {
            if (!formatter) formatter = 'unixSeconds';
            return TableStore.util.date[formatter](TableStore.util.date.from(date));
        }

    },

    crypto: {
        crc32Table: [
            0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419,
            0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4,
            0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07,
            0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
            0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856,
            0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
            0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4,
            0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
            0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3,
            0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A,
            0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599,
            0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
            0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190,
            0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F,
            0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E,
            0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
            0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED,
            0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
            0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3,
            0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
            0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A,
            0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5,
            0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010,
            0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
            0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17,
            0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6,
            0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615,
            0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
            0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344,
            0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
            0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A,
            0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
            0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1,
            0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C,
            0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF,
            0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
            0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE,
            0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31,
            0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C,
            0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
            0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B,
            0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
            0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1,
            0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
            0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278,
            0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7,
            0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66,
            0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
            0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605,
            0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8,
            0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B,
            0x2D02EF8D],

        crc32: function crc32(data) {
            /*jshint bitwise:false*/
            var tbl = TableStore.util.crypto.crc32Table;
            var crc = 0 ^ -1;

            if (typeof data === 'string') {
                data = new Buffer(data);
            }

            for (var i = 0; i < data.length; i++) {
                var code = data.readUInt8(i);
                crc = (crc >>> 8) ^ tbl[(crc ^ code) & 0xFF];
            }
            return (crc ^ -1) >>> 0;
        },

        hmac: function hmac(key, string, digest, fn) {
            if (!digest) digest = 'binary';

            if (digest === 'buffer') {
                digest = undefined;
                // todo: 不支持 buffer 类型的 hash
                return "";
            }

            if (!fn) fn = 'sha256';

            if (typeof string != 'string') {
                //string = new Buffer(string);
                // todo: 目前只支持 string
                return "";
            }

            var shaObj;
            switch (fn) {
                case "md5":
                    // todo: 不支持 md5
                    return "";
                case "sha1":
                    shaObj = new jsSHA("SHA-1", "TEXT");
                    break;
                case "sha256":
                    shaObj = new jsSHA("SHA-256", "TEXT");
                    break;
                case "sha512":
                    shaObj = new jsSHA("SHA-512", "TEXT");
                    break;
                default:
                    return "";
            }

            shaObj.setHMACKey(key, "TEXT");

            shaObj.update(string);

            switch (digest) {
                case "binary":
                    return shaObj.getHMAC("BYTES");
                case "hex":
                    return shaObj.getHMAC("HEX");
                case "base64":
                    return shaObj.getHMAC("B64");
                default:
                    return "";
            }
        },

        // https://nodejs.org/api/crypto.html#crypto_hash_digest_encoding
        md5: function md5(data, digest) {
            var hash = "";

            if (!digest) { digest = 'binary'; }

            if (digest === 'buffer') {
                digest = undefined;
                // todo: 不支持 buffer 类型的 hash
                return "";
            }

            if (typeof data === 'string') {
                switch (digest) {
                    case "binary":
                        return SparkMD5.hash(data, true);
                    case "hex":
                        return SparkMD5.hash(data);
                    case "base64":
                        return TableStore.util.hexToBase64(SparkMD5.hash(data));
                    default:
                        return "";
                }
            }
            else {  // array buffer
                switch (digest) {
                    case "binary":
                        return SparkMD5.ArrayBuffer.hash(data, true);
                    case "hex":
                        return SparkMD5.ArrayBuffer.hash(data);
                    case "base64":
                        return TableStore.util.hexToBase64(SparkMD5.ArrayBuffer.hash(data));
                    default:
                        return "";
                }
            }
        },

        // 目前不支持 sha256 hash
        sha256: function sha256(string, digest) {
            //if (!digest) { digest = 'binary'; }
            //if (digest === 'buffer') { digest = undefined; }
            //if (typeof string === 'string') string = new Buffer(string);
            //return TableStore.util.crypto.createHash('sha256').update(string).digest(digest);
            return "";
        },

        toHex: function toHex(data) {
            var out = [];
            for (var i = 0; i < data.length; i++) {
                out.push(('0' + data.charCodeAt(i).toString(16)).substr(-2, 2));
            }
            return out.join('');
        }

    },

    /** @!ignore */

    /* Abort constant */
    abort: {},

    each: function each(object, iterFunction) {
        for (var key in object) {
            if (object.hasOwnProperty(key)) {
                var ret = iterFunction.call(this, key, object[key]);
                if (ret === TableStore.util.abort) break;
            }
        }
    },

    arrayEach: function arrayEach(array, iterFunction) {
        for (var idx in array) {
            if (array.hasOwnProperty(idx)) {
                var ret = iterFunction.call(this, array[idx], parseInt(idx, 10));
                if (ret === TableStore.util.abort) break;
            }
        }
    },

    update: function update(obj1, obj2) {
        TableStore.util.each(obj2, function iterator(key, item) {
            obj1[key] = item;
        });
        return obj1;
    },

    merge: function merge(obj1, obj2) {
        return TableStore.util.update(TableStore.util.copy(obj1), obj2);
    },

    copy: function copy(object) {
        if (object === null || object === undefined) return object;
        var dupe = {};
        /*jshint forin:false */
        for (var key in object) {
            dupe[key] = object[key];
        }
        return dupe;
    },

    isEmpty: function isEmpty(obj) {
        for (var prop in obj) {
            if (obj.hasOwnProperty(prop)) {
                return false;
            }
        }
        return true;
    },

    isType: function isType(obj, type) {
        // handle cross-"frame" objects
        if (typeof type === 'function') type = TableStore.util.typeName(type);
        return Object.prototype.toString.call(obj) === '[object ' + type + ']';
    },

    typeName: function typeName(type) {
        if (type.hasOwnProperty('name')) return type.name;
        var str = type.toString();
        var match = str.match(/^\s*function (.+)\(/);
        return match ? match[1] : str;
    },

    error: function error(err, options) {
        var originalError = null;
        if (typeof err.message === 'string' && err.message !== '') {
            if (typeof options === 'string' || (options && options.message)) {
                originalError = TableStore.util.copy(err);
                originalError.message = err.message;
            }
        }
        err.message = err.message || null;

        if (typeof options === 'string') {
            err.message = options;
        } else {
            TableStore.util.update(err, options);
        }

        if (typeof Object.defineProperty === 'function') {
            Object.defineProperty(err, 'name', { writable: true, enumerable: false });
            Object.defineProperty(err, 'message', { enumerable: true });
        }

        err.name = err.name || err.code || 'Error';
        err.time = new Date();

        if (originalError) err.originalError = originalError;

        return err;
    },

    /**
     * @api private
     */
    inherit: function inherit(klass, features) {
        var newObject = null;
        if (features === undefined) {
            features = klass;
            klass = Object;
            newObject = {};
        } else {
            /*jshint newcap:false */
            /*jshint camelcase:false */
            var ctor = function __ctor_wrapper__() { };
            ctor.prototype = klass.prototype;
            newObject = new ctor();
        }

        // constructor not supplied, create pass-through ctor
        if (features.constructor === Object) {
            features.constructor = function () {
                if (klass !== Object) {
                    return klass.apply(this, arguments);
                }
            };
        }

        features.constructor.prototype = newObject;
        TableStore.util.update(features.constructor.prototype, features);
        features.constructor.__super__ = klass;
        return features.constructor;
    },

    /**
     * @api private
     */
    mixin: function mixin() {
        var klass = arguments[0];
        for (var i = 1; i < arguments.length; i++) {
            /*jshint forin:false*/
            for (var prop in arguments[i].prototype) {
                var fn = arguments[i].prototype[prop];
                if (prop != 'constructor') {
                    klass.prototype[prop] = fn;
                }
            }
        }
        return klass;
    },

    /**
     * @api private
     */
    hideProperties: function hideProperties(obj, props) {
        if (typeof Object.defineProperty !== 'function') return;

        TableStore.util.arrayEach(props, function (key) {
            Object.defineProperty(obj, key, {
                enumerable: false, writable: true, configurable: true
            });
        });
    }
};

module.exports = TableStore.util;
